On Board Diagnostic (OBD)
Navigation system IV has On Board Diagnostic (OBD) capabilities.
The Navigation control module has a Diagnostic Trouble Code (DTC) memory. If a malfunction occurs in one of the components or wires which is monitored by the system, a record of the type of malfunction is stored in DTC memory. See NAVIGATION SYSTEM IV ON BOARD DIAGNOSTIC (OBD), INITIATING .